Just now а build of the game for Linux has been uploaded to the server. (builds for ubuntu and manjaro)
For Steam Deck you can set the compatibility in the steam deck settings to !Steam Linux Runtime 1.0!
The controller should also be set to Keyboard + mouse.
If you click on the controller icon, chosse keyboard (WASD)
Steam Deck
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.